I feel like the idea has merit. I've mentioned it before, but my father in law was a huge fan of contenders. He thought it was the perfect platform for about everything. I can't tell you how many different times he talked about almost exactly this gun. He wanted cut down a 45-70 case, prime it, dump in his powder charge and then seal it with an over powder card. Load that from the breech and load the bullet from the muzzle. That was going to be his super simple muzzleloader. But he didn't want to risk his 45-70 barrel in case something went wrong, and when he asked the state DNR about it they said absolutely not. If there was any possibility of it loading from the breech then it was a no go. I believe the conversation came down to their needing to be a breech plug that couldn't just fall out of the barrel (he also thought about cutting down a case down to about a half inch or so, filling it so it was solid then tapping it for a vent liner and using that as a threadless breech plug.)
So all that said, I can see where the idea has merit. I could see it being a super easy way to get a kid out during ML season or just a different type of gun to play with. I'm disappointed because it's not a gun I can hunt with. Initially I expected something much different so I had to adjust expectations. I appreciate the ingenuity and I understand now why Haus of Arms kept referring to it as more of a hybrid muzzleloader. I won't but one of those because I can't shoot it, however if Lehigh can develop a true smokeless muzzleloader based off this new SSK -50 frame I'll buy one even if I can only shoot reduced loads with it.